A SED-based approach to predict the fatigue strength of notched and plain shot-peened parts
Author: M. Benedetti1, M. Bandini2, S. Raghavendra1, V. Fontanari1, and F. Berto3 1 Department of Industrial Engineering, University of Trento, Italy 2 PeenService, Bologna, Italy 3 Dep. of Mechanical and Industrial Engineering, Norwegian University of Science an
Source: ICSP14 Milan
Doc ID: 2022086
Year of Publication: 2022
Abstract:
Abstract
A Strain Energy Density (SED) based fatigue criterion is developed to incorporate residual
stresses (RS). Mechanical and residual stresses are treated separately. The formers are
encapsulated in the form of SED associated to stress range and maximum SED. The work
done when tensile mechanical strains fluctuate in the presence of compressive RS is added
to the equivalent SED of the fatigue criterion. This is calibrated and validated using the
results of an extensive experimental campaign aimed at exploring the effect of shot-peened
induced RS on plain and notch fatigue strength of Al-7075-T651.
Keywords Strain energy density; Notch fatigue assessment; Residual stresses; Shot
peening.
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